From: Robert A Duff <bobduff@shell01.TheWorld.com>
Subject: Re: Dynamic Variant Record Creation
Date: Tue, 16 Mar 2010 20:15:36 -0400
Date: 2010-03-16T20:15:36-04:00 [thread overview]
Message-ID: <wccr5nj247r.fsf@shell01.TheWorld.com> (raw)
In-Reply-To: hnp4r7$eqo$1@munin.nbi.dk
"Randy Brukardt" <randy@rrsoftware.com> writes:
> GROAAANNN!!! :-)
;-)
> I'd like to see a solution to this problem, but I don't think this is it.
> The problem is that the compiler wouldn't know what components to generate,
> so it would effectively have to generate a giant case statement:
>
> X := (Token => T, others => <>) would become:
>
> case T is
> when LEX_ID => X := (Token => LEX_ID, String_Id => <>);
> when '!' => X := (Token => '!');
> ...
> end case;
Well, this is not hugely different from the case statement that the
compiler has to generate for:
X : Token_Unit (Token => T);
to default-initialize stuff.
But I agree it's not worth the trouble.
By the way, why do we call the kind/type of token "Token",
and the whole token is "Token_Unit" or some such? I realize that's
what the compiler textbooks often do, but I'd prefer the enumeration
be called Token_Kind, and the record (containing the kind as well as
the identifier string or whatever) be called something else, like Token.
- Bob
next prev parent reply other threads:[~2010-03-17 0:15 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-16 17:11 Dynamic Variant Record Creation Warren
2010-03-16 18:31 ` Georg Bauhaus
2010-03-16 18:57 ` Adam Beneschan
2010-03-16 20:01 ` Warren
2010-03-16 20:09 ` Jeffrey R. Carter
2010-03-16 20:24 ` Warren
2010-03-16 20:40 ` Robert A Duff
2010-03-16 20:44 ` Warren
2010-03-16 20:31 ` Robert A Duff
2010-03-16 20:59 ` Warren
2010-03-16 21:55 ` Jeffrey R. Carter
2010-03-17 14:40 ` Warren
2010-03-18 12:57 ` Warren
2010-03-16 21:58 ` Robert A Duff
2010-03-17 14:22 ` Charmed Snark
2010-03-17 14:49 ` Robert A Duff
2010-03-17 16:30 ` Warren
2010-03-16 21:15 ` Adam Beneschan
2010-03-16 23:24 ` Adam Beneschan
2010-03-16 20:15 ` Robert A Duff
2010-03-16 21:00 ` Warren
2010-03-16 23:39 ` Randy Brukardt
2010-03-16 23:43 ` Randy Brukardt
2010-03-17 0:15 ` Robert A Duff [this message]
2010-03-17 14:28 ` Warren
2010-03-18 0:02 ` Randy Brukardt
2010-03-17 4:20 ` Adam Beneschan
2010-03-18 0:13 ` Randy Brukardt
2010-03-18 13:00 ` Warren
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